Study Based On The Tms320f2812 Data Acquisition And Filtering And Implementation

With the fast development of the communication science,the digital signal processing hasbecome a key technic.The appearance of DSP chip makes the arithmetic of digital signalprocessing come true. The structure of the DSP chip is Harvard.DSPs are getting more andmore attentions in the information field, due to its powerful signal processing ability,becoming a hotspot in communication and other correlative signal processing fields.This paper mainly study the realization of data acquisition and digital filtering, which isbased on digital signal processor TMS320F2812 of TI company.Firstly, the structure andcharacters of TMS320F2812 and designing process and tools of DSP system are introdu-ced.Then we introduce how to connect experimental board with emulator and computer inour experiment,and illustrate the installation and configuration of CCS2.Secondly, the reali-zation of data acquisition and digital filtering in the system are analyzed in detail.In the data acquisition part,we use the 12bit ADC of the chip to collect data.The acquisiteddata is storaged in the chip's memory temporarily, then it is filtered and translated withFFT.The processed data is transmitted to PC,then the PC will storage the acquisited data indocument form.In this paper, we give the way of setting A/D sampling rate, the whole A/Dprogram process and the method of configuring. cmd document.We also analyse anddiscuss the cause of acquisition error, and give the way to improve sampling precision.In the part of digital filter design, we adopt two design ways, the one is traditional whichadd coefficients from matlab to the CCS project of filter which has been built, the otherone uses both matlab and CCS to create the project of filter automatically.we detailedlyintroduce some ways of designing FIR filter with matlab and the way of using fdatool todesign various filters. The graph way which establishes digital signal processing model toreslize DSP design and simulation confirmation through the MATLAB/ SIMULINK,andthen transform the graphic file. mdl to the C language program running in CCS directly isalso given.We use design tool of MATLAB to shorten the cycle of the productdevelopment,which is much more convenience than programming in CCS directly.